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Design a Solenoid Lens for MeV Ultrafast Electron Diffraction Device

机译:用于MEV超快电子衍射装置的电磁镜头

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The solenoid lens is the only transverse focusing device in the ultrafast electron diffraction (UED) system that is being developed at HUST, which -control the beam spot size and compensate the beam transverse emittance. This paper focuses on the parameter optimization of the multi-coil solenoid lens MeV-UED to obtain a desired magnetic field, especially for the shape of the pole shoe, the axial and radial dimensions of the solenoid. Two finite element analysis (FEA) software Opera and Parmela are combined to optimize the electromagnetic field. Results show that after parameter optimization, the transverse beam emittance can be reduced by 60.6%, and the beam spot size is reduced by 70%.
机译:电磁镜是超快电子衍射(UED)系统中的唯一横向聚焦装置,该系统正在呼吸中开发,该系统 - 控制光束光斑尺寸并补偿光束横向发射率。本文侧重于多线圈电磁透镜Mev-UED的参数优化,以获得所需的磁场,特别是对于杆靴的形状,螺线管的轴向和径向尺寸。两种有限元分析(FEA)软件歌剧和Parmela组合以优化电磁场。结果表明,在参数优化后,横向光束发射率可以减少60.6%,梁点尺寸减少了70%。

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